AD737KR-REEL Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices AD737KR-REEL is a low-cost, low-power true RMS-to-DC converter in an SO-8 tape-and-reel package. It accepts AC input signals up to 200 mVRMS and operates from ±3.2 V to ±16.5 V dual supplies with a quiescent current of only 160 µA. Ideal for multimeters, energy monitoring systems, and audio signal-level measurement instruments requiring accurate true-RMS conversion.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- AD737KR-REEL Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of AD737KR-REEL?
- True RMS-to-DC conversion with 0.35% maximum linearity error for accurate measurement of non-sinusoidal waveforms
- Ultra-low quiescent current of 160 µA enabling long battery runtime in portable handheld measurement instruments
- Wide dual supply range of ±3.2 V to ±16.5 V for compatibility with both single-cell and bench-supply powered designs
- Accepts input signals from DC to above 100 kHz with a 200 mVRMS input range for versatile signal measurement
- Compact SO-8 package on tape-and-reel for automated PCB assembly in high-volume production meter designs
What is AD737KR-REEL used for?
The AD737KR-REEL is well suited for handheld digital multimeters and clamp meters that need to measure true RMS voltage and current of non-sinusoidal waveforms such as PWM motor drives and switching power supply outputs, where a simple average-responding converter would introduce errors exceeding 40%. Its low 160 µA supply current makes it the preferred choice for battery-operated energy monitors and power quality analyzers that must run for hundreds of hours from AAA cells on a ±3.2 V supply. Audio VU meters and instrumentation amplifier output monitors in signal-chain test equipment also deploy this converter for accurate level detection across the 20 Hz to 100 kHz audio band.
What are the specifications of AD737KR-REEL?
| Source Url Status Check Date | 2013-05-01 14:56:17.757 |
| Pbfree Code | No |
| Manufacturer Package Code | R-8 |
| YTEOL | 0 |
| Converter Type | RMS TO DC CONVERTER |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e0 |
| Linearity Error-Max (EL) | 0.35% |
| Negative Supply Voltage-Max | -16.5 V |
| Negative Supply Voltage-Min | -3.2 V |
| Negative Supply Voltage-Nom | -5 V |
| Number of Functions | 1 |
| Operating Frequency-Max | 0.005MHz |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 240 |
| Positive Input Voltage-Max | 1V |
| Qualification Status | Not Qualified |
| Supply Current-Max | 0.21mA |
| Supply Voltage-Max | 16.5V |
| Supply Voltage-Min | 2.8V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Tin/Lead (Sn85Pb15) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Total Error-Max | 2% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.50 |
Where can I find the AD737KR-REEL datasheet?
AD737KR-REEL Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for AD737KR-REEL?
Compatible alternatives and drop-in replacements for AD737KR-REEL:
Frequently Asked Questions
What bandwidth and linearity does AD737KR-REEL achieve for small-signal AC inputs up to 200 mVRMS?
The AD737KR-REEL delivers a -3 dB signal bandwidth exceeding 100 kHz at 200 mVRMS input, with a maximum linearity error of 0.35%. This allows accurate true-RMS measurement of power-line harmonics through the 20th harmonic of 50 Hz and audio-band signals from 20 Hz to 100 kHz without additional filtering or calibration in handheld instruments.
Which portable energy metering and power quality applications benefit most from deploying AD737KR-REEL?
Battery-powered clamp meters, handheld power quality analyzers, and residential energy monitors use AD737KR-REEL because its 160 µA quiescent current on ±3.2 V to ±16.5 V dual supplies provides runtime of hundreds of hours from standard AA or lithium cells. True-RMS conversion is essential in these instruments for measuring variable-frequency drive outputs, switching supply ripple, and non-sinusoidal industrial waveforms where average-responding converters introduce errors exceeding 40%.
How does AD737KR-REEL compare to AD536A when choosing a true-RMS converter for a battery-operated multimeter?
The AD737KR-REEL draws only 160 µA typical supply current versus the AD536A's 800 µA, making the AD737 5 times more power-efficient for ±3 V lithium-cell powered designs. Both ICs achieve true-RMS accuracy, but the AD737 targets the low-power 200 mVRMS input range in SO-8 packaging, while the AD536A supports wider input ranges and higher supply voltages up to ±18 V for benchtop instruments where battery life is not a constraint.
What averaging capacitor value should designers use with AD737KR-REEL for accurate 50 Hz AC measurements with low output ripple?
For 1% peak ripple on the DC output when measuring a 50 Hz fundamental, a 33 µF capacitor on the CAV pin is recommended per the AD737 application notes. Increasing the capacitor to 100 µF reduces ripple to below 0.1% but extends the settling time constant to approximately 2 seconds per full-scale change, requiring designers to balance measurement speed against output ripple in 50 Hz or 60 Hz energy meter applications.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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